Auto version bump

[miniscruff]

Is your feature request related to a problem? Please describe.
When using changie with automation tools like github actions one input is required, the next version. There are a few shortcuts, namely major/minor/patch to automatically bump based on input. However, most projects probably follow a kind to bump rule of bugs=patch, features=minor and changed=major ( or whatever your team uses for terms ).

Describe the solution you'd like
Changie should, allow configurations of kinds to what bump value they should incur. When using "auto" mode, the next version can be determined by the "highest" bump value of all the changes.

Describe alternatives you've considered
Manual inputs of major/minor/patch are still allowed but, if configured, would be automatic.

Additional context
Next command should also allow auto mode.